The one major change series creator Aaron Sorkin made to The Newsroom between seasons was a structural one. Instead of having each week's show focus on a separate major storyline, this year's edition of The Newsroom follows a single story over the course of the entire season. And it's a season-long plot line in which anchor Will McAvoy and the other employees of the fictional Atlantic Cable News network get one important news report very wrong.

The FX version of the Scandinavian series The Bridge, like the Showtime version of the Israeli TV series that inspired Homeland, is a major revamp as well as a crucial relocation. With Homeland, the focus became American politics and home-soil terrorism. In The Bridge, premiering July 10, the setting is changed to the U.S.-Mexico border. This allows executive producer Meredith Stiehm, a writer-producer from Homeland, to deal with everything that relocation provides — including the white-hot issues of immigration reform and border security.

For at least as long as there have been Fall Preview issues of TV Guide, there's been a sense of optimistic excitement about the start of new television series. But more recently, producers of long-running TV shows have injected excitement into the ends of their programs' life spans as well. By announcing, in advance, that a show is going into its final season, no matter what, it ups the emotional ante on what to expect — and, with a finite end in sight, what might happen.

When Mitch Hurwitz and his collaborators began making the Fox sitcom Arrested Development 10 years ago, it was loaded with jokes — in-jokes, recurring jokes and just plain bizarre jokes — that rewarded viewers who watched more than once. But even though it won the Emmy for best comedy series one year, not enough viewers bothered to watch it even once, so the show was canceled in 2006 after three seasons. And that would have been it, except for a loyal cult following that built up once the show was released on DVD and the Internet.

Before you see any of Behind the Candelabra -- when you just consider the concept of the TV movie and its casting — this new HBO Films production raises all sorts of questions: How much will be based on verifiable fact, and how much will be fictionalized? On an anything-goes premium-cable network such as HBO, how graphic will the sex scenes be?

And the most important questions involve the drama's two leading men, playing an ultra-flamboyant piano player and the wide-eyed young man who becomes his behind-the-scenes companion for five years. Michael Douglas? Matt Damon?

Christopher Guest, co-creator with Jim Piddock of the new HBO comedy series Family Tree, obviously is having a good time making this show — and it's contagious. It's several shows in one, and every element is a self-assured little delight.

Rectify, a new drama series from the Sundance Channel, wants to stand out from the pack — and it certainly succeeds at that. It's a six-hour limited series, more along the British model of TV than ours here in the States. If these first six installments catch on enough, the story will continue. If not, that's it.

And Rectify is so unusual a show, with its own deliberate pace and premise and approach, that it may not build enough viewership to keep going. But that doesn't mean it's nota worthwhile show, or a memorable one — because it is.

Ken Burns has said that no matter what subjects he tackles in his documentaries — baseball or jazz, Mark Twain or the Civil War — they always seem to boil down to two things: "race and place."

That's certainly true with his latest film, TheCentral Park Five, which tells of the violent assault and rape of a female jogger in 1989. The place was New York City — and because of citywide racial tensions at the time, the story was seized upon by New York tabloids and national TV newscasts alike.

For decades, when broadcast television called the shots and dominated the TV landscape, the biggest event of the year was "the fall season," when networks would unveil their new shows and return with fresh episodes of old favorites. But now, because of cable and satellite TV, the fall season isn't the only game in town.

The HBO movie Phil Spector is a production that demands attention because of the heavyweight names attached. First, of course, there's the subject of the drama: Spector himself, the man who invented the "wall of sound," and recorded hits for everyone from the Crystals, Darlene Love and Ike & Tina Turner to the Beatles and the Righteous Brothers. Oh, and who also went on trial, in 2007, for the 2003 shooting death of actress Lana Clarkson.

Top of the Lake, a new seven-part miniseries premiering tonight on the Sundance Channel, was co-created and co-directed by Jane Campion, who teamed with Holly Hunter 20 years ago on the movie The Piano. Hunter is back for this new project, playing a mysterious New Agey guru of sorts. She's started a small commune for emotionally damaged women, on a remote strip of land in New Zealand.

This week brings two new high-profile drama series. One is The Americans, premiering Jan. 30 on the FX network; it's about sleeper KGB agents living in the U.S. during the Reagan era. The other is House of Cards, a new series premiering Feb. 1.

In the new Fox TV series The Following, Kevin Bacon plays a former FBI agent asked to help apprehend an escaped serial killer he once put behind bars. The show is from Kevin Williamson, who also created the Scream horror-movie franchise.

Of all the cable comedies returning with new episodes Sunday, Girls is the most ambitious — as well as the most unpredictable, and occasionally unsettling.

When thirtysomething premiered on ABC more than 25 years ago — yes, it's been that long — that drama series was both embraced and attacked for focusing so intently on the problems of self-obsessed people in their 30s. What that drama did for that generation, Girls does for a new one — and for an even younger demographic, by presenting a quartet of young women in their mid-20s.

Downton Abbey, the drama series about the residents and servants at a grand estate in early 20th-century England, has done for PBS what the commercial broadcast networks couldn't achieve last year. It generated a hit show — one with an audience that increased over its run and left fans hungry for more. And that's a lot of hunger because when the second season was televised here in the states, it averaged 7 million viewers, more than most TV shows on any network, cable or broadcast.

On Friday night on PBS, Great Performances presents a documentary about the making of a Beatles TV special from 1967 — Magical Mystery Tour — then shows a restored version of that special. Magical Mystery Tour has the music from the U.S. album of the same name, but it's not the album. It's a musical comedy fantasy about the Beatles and a busload of tourists taking a trip to unknown destinations.

I'm biased, of course, because I'm a television critic — but to me, giving someone a gift of a TV show you yourself enjoyed tremendously is somehow very personal. You're giving something that you love, and that in many cases will occupy many hours, if not days, of their time. And during that time, they'll occasionally be reminded of you.

Right now, as we near the end of the 2012 fall TV premiere week, there's a tendency for a sense of weariness to set in. So many of the new TV series are so bad this year, and not one of them is outstanding. It tends to get a little depressing.

But then you think about the rich bounty of returning series, and how good television drama has gotten lately, and there's cause to rejoice all over again.

Last year, the broadcast networks didn't do well at all when it came to new series development. We got ABC's clever Once Upon a Time, which was about it for the fall crop, until midseason perked things up with NBC's Smash. Otherwise, a year ago, all the exciting new fall series were on cable, thanks to Showtime's brilliant Homeland and FX's audacious American Horror Story.

Johnny Carson walked away from TheTonight Show, after 30 years at the top of the late-night ratings, of his own volition. And except for a few fleeting TV appearances after he retired, he never looked back — and never went back. When filmmaker Peter Jones would send an annual letter to Carson, asking for his cooperation in a TV biography of him, the answer was always no. One year, Carson went so far as to explain why: Let the work, he said, speak for itself.

I, Claudius came to American television, imported from the BBC, in 1977 — the same year as another ambitious long-form production, ABC's Roots, which proved to everyone that miniseries were an exciting and extremely popular new form of television. I, Claudius, shown on the PBS series Masterpiece Theatre, didn't get anything close to the audience that Roots did — but it sure got a lot of attention.

This Sunday, HBO premieres a new comedy series that's written and directed by Lena Dunham, who grabbed the media spotlight in 2010 with her film Tiny Furniture. She's 25 years old now, and stars in this new TV series as well.

AMC's The Killing started strong, with raves from critics and an impressively loyal core of viewers. But in the final episode of the year, when it left its season-long murder mystery intentionally unresolved, most fans felt angry, even betrayed. HBO's Game of Thrones, on the other hand, took a bit longer to get established, and to get as much attention. But thanks to some strong performances and a few bold strokes of plot, Game of Thrones — based on the George R. R.

Yes, it was worth the wait. Absolutely. Mad Men returns Sunday with a two-hour season premiere — and by the time it's over, if you react the way I did, you'll be satisfied and even comforted to have spent two wonderful hours with the folks at Sterling Cooper Draper Pryce.

There are times when TV dramas about national politics and politicians deserve criticism, even ridicule, for their fast-and-loose narratives and characterizations. Recent miniseries about the Reagans and the Kennedys, loaded with unsubstantiated dialogue and action, are only two very fresh examples.

But Game Change — HBO's new take on the John McCain-Sarah Palin campaign — is entertaining, and commendable, precisely because it stays so close to the facts, not because it strays from them.

The premise of NBC's new detective series, Awake, is about as high concept as it gets. Jason Isaacs, one of the leads of Showtime's Brotherhood, stars as Michael Britten, who survives a horrible car crash intact. Well, his body is intact — but his mind, or at least his subconscious, is split.

The Singing Detective is the story of a writer of pulp-fiction novels, hospitalized for a horrible skin condition that has his entire body flaking and raw, and his mind slipping in and out of fever dreams.

Some of those hallucinations have the people around him breaking into song, or shifting into other places and times and characters, or both. He tries to maintain his sanity by rewriting, in his head, one of his old novels into a Hollywood screenplay — and, in his mind, he's the healthy, good-looking protagonist — the singing detective.

The two DVDs I want to talk about today are hilarious, but they aren't sitcoms. They're talk shows — well, one's a talk show, and one's a filmed seminar. But they're both fascinating examples of a specific pop-culture moment frozen in time.

And they're something else as well: Both are highly entertaining real-time examples of talk-show Darwinism. Both shows feature a large, unwieldy guest roster, all of the guests competing for attention at the same time — and by the time the programs are over, the winners are apparent.

It isn't a long shot that David Milch's newest series for HBO, called Luck, will be on par with his HBO series Deadwood. It's a sure thing. HBO sent out all nine episodes of the show's first season for preview, so there's no guesswork here.